25952521 has 16 divisors (see below), whose sum is σ = 30604288. Its totient is φ = 21546000.

The previous prime is 25952519. The next prime is 25952543. The reversal of 25952521 is 12525952.

It is not a de Polignac number, because 25952521 - 2¹ = 25952519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25952501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45166 + ... + 45736.

It is an arithmetic number, because the mean of its divisors is an integer number (1912768).

Almost surely, 2^25952521 is an apocalyptic number.

It is an amenable number.

25952521 is a deficient number, since it is larger than the sum of its proper divisors (4651767).

25952521 is a wasteful number, since it uses less digits than its factorization.

25952521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 772.

The product of its digits is 9000, while the sum is 31.

The square root of 25952521 is about 5094.3616871989. The cubic root of 25952521 is about 296.0691683074.

The spelling of 25952521 in words is "twenty-five million, nine hundred fifty-two thousand, five hundred twenty-one".